Halogenated vat dyes and process of making same.



UNITED sTATns PATENT OFFICE.

OSCAR BALLY, OF MANNHEIM, GERMANY, ASSIGNOR TO BADISCHE ANILIN 8c SODA FABRIK, OF LUDWIGSHAFEN-ON-THE-RHINE, GERMANY, A CORPORATION.

HALOGENATED VAT DYES AND PROCESS OF MAKING SAME.

No Drawing.

siding at Mannheim, Germany, have invented new and useful Improvements in Halogenated Vat Dyes and Processes of Making Same, of which the following is a specification.

It is known that by treating halogenated anthraquinones with thiosalicylic acid, intermediate condensation products can be obtained containing one or more than one thiosalicylic residue attached to each anthraquinone residue, and that these intermediate compounds, on further treatment with a condensing agent, give rise to vat coloring matters (see the specifications of British Letters Patent'Nos. 13,907 and 30,480 A. D. 1909). These coloring matters are termed anthraquinonc thioxanthones. I have now found that, by treating these anthraquinone thioxanthones with halogen or with other halogenating agent, halogenated vat coloring matters can be obtained which have more vivid shades than those of the original coloring matters, while an alteration of shade generally takes place in the direction of from violet to red, and from red or orange to yellow. The same, or similar, halogenated coloring matters can be obtained if the intermediate condensation products be treated with halogen, or other halogenating agent, and the resulting halogenated intermediate products be afterward subjected to the action of a condensing agent so that the halogenated coloring matter is directly produced.

The following example will serve to illustrate further how this invention can be carried into practical effect, but my invention is not confined to this example. The parts Specification of Letters Fatent.

Application filed January 20, 1911. Serial No. 603,736.

Patented May 14, 1912.

are by weight. Suspend 3 parts of anthraquinone-l.5-dithioxanthone in 80 parts of nitrobenzene, add 3 parts of bromin and heat the whole, on-the waterbath for 24 hours. Then filter ofi the bromin derivative, which has separated out, and wash it with nitrobenzene and alcohol and dry it. It. consists of a red powder which dissolves in sulfuric acid, the solution being orange-red, and it is practically insoluble in alcohol, benzene, and nitrobenzene. It dyes cotton, from the vat, shades which are yellower than those obtained from the non-hrominated product.

My new products differ from the coloring matters obtainable according to the British patents hereinbefore mentioned, in that they contain at least one halogen atom in a benzene ring which is attached to the anthraquinone residue. In addition they are insoluble in dilute acids and alkalis, soluble in concent-rated sulfuric acid with a yellow to red color, and they dye cotton from a vat yellow-red shades, and in the sultonated form dye wool from yellow to red shades.

Now what I claim is 1. The process of producing halogenated colorin'g matter of the anthracene series by treating an anthraquinone thioxanthone with a halogenating agent. 1

2. The process of producing halogenated coloring matter of the anthracene series by reacting with bromin on anthraquincjne- 1.5-di-thioxanthone.

3. As new articles of manufacture coloring matters being halogenated anthraquinone-thioxanthones which can be obtained by treating an anthraquinone thioxanthone with a halogenating agent,'wliich new coloring matters contain atleast one halogen atom in a benzene ring which is attached to the anthraquinone residue, are insoluble in dilute acids and alkalis, soluble in concentrated sulfuric acid with alyellow to red color, and dye cotton from a vat yellow-red shades, and in the sulfonated form dy wool from yellow to red shades.

at. As a new article ofmannfacture the halogenated coloring matter of the anthracene series which can be obtained by reacting with bromin on anthraquinone-lfidithioxanthone, which new coloring matter contains bromin in at least one benzene residue and consists when dry of a red powder which is insoluble in dilute acids and alkalis, but is soluble in concentrated sulfuric acid with an orange-red color, and which dyes cotton from the vat yellow-red shades which are yellower than those obtained from the non-brominated product.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

Witnesses:

J. Arno. LLoYD, A. O. TITTMANN.

Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents,

Washington, D. U.

- OSCAR BALLYL 

